COVID-19 Protocol: During these trying times we are still providing services as safely as possible by wearing face masks, disposable boot covers, and gloves on each and every job. Our team members are also sanitizing vans, hand tools, smart devices at the beginning of and throughout each day. We ask that if you do schedule a service, that you maintain a minimum of 6′ from our employees and also wear a mask. If you are in need of service we are still here to help.

Watertown Tankless Water Heaters

Look no further than the professionals at Akian Plumbing, Heating & Air Conditioning for tankless water heater services in Watertown. These systems are sensitive, complex, and require qualified personnel to properly install and repair. Our technicians are trained and up-to-date on changes in the tankless water heating market. We are certified in Rinnai systems and also have experience installing, servicing, maintaining, and repairing Navien, Bosch, Rheem, A.O. Smith, and more.

We are proud to offer our customers a wide variety of benefits, including:

Services that have earned numerous awards and accolades

Technicians who are trained on the latest in plumbing technology

Service available on nights and weekends

Licensed and insured plumbers for your peace of mind

Why You Need Gas Calculation

Tankless water heaters require a large gas load. Often, the load is four to five times larger than the standard residential water heater. A unit installed with an undersized natural gas system will result in issues with the combustion of the unit. The unit may seem at first as if it is working properly and, in some cases, it could take years for issues to arise. When the system finally does break down, it results in costly repairs that could have been avoided with proper installation. Upsizing a gas system can cost thousands of dollars and, if this cost is not presented upfront, can be quite an unpleasant surprise to the homeowner. Our Certified Plumbing Designer, Stephen S. Akian, will ensure that this is checked prior to us performing any work.

Water Testing

Low/high incoming water pressure affects the performance and integrity of the tankless water heater. Low pressure will result in the unit not making hot water, as there are minimum flow requirements. High pressure can lead to leaks within the unit and also affect the heat exchange due to water passing through too quickly. We check for hardness, as well, to ensure calcium or magnesium deposits do not plug up or negatively affect the unit in any other way.

Special Offers

$15 OFF

First Time Services


Limit 1 coupon per customer. May not be combined with other offers. Coupon must be mentioned at time of scheduling.

Valid from Jan 1, 2020 – Dec 31,2020


Free water test



Limit 1 coupon per customer. May not be combined with other offers. Coupon must be mentioned at time of scheduling.

Valid from Jan 1, 2020 – Dec 31,2020


Installation Services

We specialize in plumbing and are prepared to provide you with solutions to whatever problem you are facing. Our network of vendors is broad, so even when you have an uncommon or rare plumbing faucet, shower valve, toilet, or bathtub spout, we have the means to complete the job.

Our in-home assessment includes the following:

We offer a broad range of services, including:

Akian Plumbing Team

Contact Our Team Today

We Look Forward to Helping You